1) All variables must be declared before being used ( true or false ) 2) C++ con
ID: 3573513 • Letter: 1
Question
1) All variables must be declared before being used ( true or false )
2) C++ considers the variable number and NUMBER to be identical. ( true or false )
3) The arithmetic operators *, / , + and - have the same level of precedence. ( true of false )
4) The OR(||) operator has higher precedence that the AND (&&) operator. ( true or false )
5) The OR (||) operator stops after finding one condition to be true. ( true of false )
6) The AND (||) operator stops after finding onr condition to be true. (true or false )
7) And (&&) is a binary operator. ( true or false )
8) The statement cout<<"a=5;"; is a typical assignment statement. (true or false )
9) The default case is require in the switch statement. ( true or false )
Explanation / Answer
Answer :
1) All variables must be declared before being used ( true or false )
2) C++ considers the variable number and NUMBER to be identical. ( true or false )
3) The arithmetic operators *, / , + and - have the same level of precedence. ( true of false )
4) The OR(||) operator has higher precedence that the AND (&&) operator. ( true or false )
5) The OR (||) operator stops after finding one condition to be true. ( true of false )
6) The AND (||) operator stops after finding onr condition to be true. (true or false )
7) And (&&) is a binary operator. ( true or false )
8) The statement cout<<"a=5;"; is a typical assignment statement. (true or false )
9) The default case is require in the switch statement. ( true or false )
Answer :
1) All variables must be declared before being used ( true or false )
Answer :
true
Explanation :
Yes,It is true All variables must be declared before being used.A C++ compiler needs to know the type of a variable before it can figure out how it is being used in an expression. Technically, C++ compilers may assume that an undeclared variable is an int, but usually this assumption is either wrong or leads to problems later.
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2) C++ considers the variable number and NUMBER to be identical. ( true or false )
Answer :
false
Explanation :
C++ is case sensitive.
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3) The arithmetic operators *, / , + and - have the same level of precedence. ( true of false )
Answer :
false
Explanation :
It is false, The arithmetic operators *, / , + and - have the same level of precedence.
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4) The OR(||) operator has higher precedence that the AND (&&) operator. ( true or false )
Answer :
false
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7) And (&&) is a binary operator. ( true or false )
Answer:
false
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9) The default case is require in the switch statement. ( true or false )
Answer:
False.
Explanation :
The default case is optional. If no default action is needed, then there is no need for a default case.
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